In these instances, unless the whole roof is to be stripped, it is impossible to use an unventilated roof, because a breathable sarking membrane cannot be installed. Recent research suggests that the unventilated, sealed roof approach yields a more energy efficient roof as the impacts of ventilation and incidental infiltrating cold air are negated. Position of Insulation Dependent on the designed insulation value of the construction and the available rafter depth and headroom, different approaches can be taken. It is recommended to use two layers of insulation to achieve required U—values.
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Details also available in NBS Plus. NBS users should refer to clause s : E20 Standard and Intermediate E20 30 Minor Works 3 floor TF70 Design Considerations Sustainability In the past, erroneously, the relative environmental sustainability of insulation materials has been compared on the basis of embodied energy and ozone depletion potential.
It is now recognised that a much wider basket of embodied environmental impacts including those caused by their embodied energy , rather than embodied energy alone, is the only credible tool of comparison. Time has also annulled ozone depletion potential as an issue as all insulation materials are now banned from using CFC and HCFC blowing agents by law. For buildings designed to todays Building Regulations energy use standards it is now also known that the embodied environmental impacts of all of the materials and labour used to create a building are insignificant in comparison with the lifetime operational environmental impacts of that building, and so are of very limited importance.
Since it is operational energy use that creates the vast majority of operational environmental impact, saving energy by specifying the lowest Uvalues possible is the most environmentally sustainable action to take.
However, one of the most neglected facts about environmentally sustainable buildings is that the longevity of their standards of operational energy use, and therefore the longevity of their operational environmental impacts, is critical. The performance of some insulants, such as mineral fibre, can deteriorate rapidly if exposed to water penetration, air movement or compression.
This may increase operational energy use and hence compromise the environmental sustainability of the finished building to an alarming degree. Other insulation materials, such as rigid phenolic or rigid urethane, are not vulnerable to any of these problems.
In summary, designers should: a specify the lowest possible Uvalue regardless of insulation type; b design out the risk of their chosen insulant not performing as specified; and c if the latter is not possible, choose an insulant that is at low risk of failure e. However, manufacturers should not rest on their laurels; it is a matter of social responsibility to be open and honest about the environmental impact of the manufacture of a product, and a full Life Cycle Analysis LCA based on a much wider basket of environmental impacts, rather than embodied energy alone, is recognised as the preferred tool to achieve this.
Kingspan Insulation was the first insulation manufacturer to openly complete and publish independently certified Ecoprofiles a type of LCA on its product ranges.
A company can, and should, demonstrate its financial viability and social responsibility, as well as ensure that its materials and methods do not add unduly to the burden placed on the planet.
Kingspan Insulation has now put the manufacture of its products at its Pembridge facility in Herefordshire through a rigorous independent appraisal of its economic, social, environmental and natural resource impacts using Arups SPeAR tool.
The results show a well balanced performance in terms of sustainability, and that Kingspan Insulation is already meeting legislation or best practice in most areas, even moving beyond best practice in some.
Kingspan Insulation is the first and only construction material manufacturer to have taken this bold move and openly publish the results. General Consideration should be given to the recommendations of CP Code of practice for protection of buildings against water from the ground and the information given in Building Research Establishment Digests numbers, Floor Screeds , and Heat Losses Through Ground Floors.
Unreinforced floor screeds can be used in conjunction with Kingspan Thermafloor TF70 in most applications. The compressive strength of Kingspan Thermafloor TF70 offers considerable advantages over some historically more popular floor insulants. However, where floor loads are to be excessive, consideration should be given to the use of Kingspan Styrozone extruded polystyrene insulation which offers greater compressive strength characteristics. For further information please contact the Kingspan Insulation Technical Service Department see rear cover.
Where Kingspan Thermafloor TF70 is to be laid over a site fabricated concrete slab, the floor slab should be allowed to dry out fully prior to the application of Kingspan Thermafloor TF For those applications where the insulation and the damp proof membrane are below the slab, construction water should be allowed to dry out, e. Surface condensation is unlikely to occur on the floor surface if the Kingspan Thermafloor TF70 is laid over the slab due to the fast thermal response of the construction.
The surface of slabs should be smooth and free of projections. Beam and block floors should level and grouted. Rough cast slabs should be levelled using a thin sand blinding to ensure boards are continuously supported. Underfloor Heating Systems The constructions shown in Figures 1, 3, 5, 7 and 9 can be readily converted to accommodate underfloor heating systems.
For a solid concrete floor, the position of the insulation is important in either exposing the thermal mass of the concrete floor to the heat provided by the system or isolating the thermal mass from it. For a 24 hour heating cycle, allowing the heat from the underfloor heating system to penetrate the concrete slab will provide a more even heating regime over a 24 hour period see Figure 2.
For intermittent heating cycles where a fast response time is required it is beneficial to have less thermal mass available to take up heat from the system and so placing the insulation layer below the screed or timber floor but above the concrete slab or beam and block floor is the best solution see Figures 4, 6 and Underfloor heating systems can also be accommodated in suspended timber floors.
This arrangement has low thermal mass and so is more suited to intermittent heating cycle applications see Figure 8. Heat Loss It has been well documented that heat loss through a ground floor consists of two components: a heat loss through the floor perimeter, which is proportional to the length of perimeter and the temperature difference between inside and outside; b heat loss through the ground which depends on the temperature difference between inside and outside and the overall floor area.
Insulating the floor perimeter in a 1 metre band Figure 12 , will not only provide good insulating results but will also prevent the risk of cold bridging at the junction of the floor and external wall. The thermal performance of an uninsulated domestic floor slab, however is relatively poor.
To enhance the thermal performance, complete rather than perimeter insulation may need to be adopted. Complete floor insulation offers significant advantages over perimeter insulation when considering the floor dimensions of typical dwellings, e. Heat transfer via the ground. Unlike roofs, walls and intermediate floors, Uvalue calculations for ground floors cannot be calculated in the normal manner with reference to the construction detail alone. Heat loss from ground floors depends upon the ratio of the exposed floor perimeter to the total floor area, the thickness of the basement wall and the depth of the basement.
Floor dimensions should be measured between the finished internal surfaces of the external walls, including projections. Nonusable space such as ducts and stairwells should be included when determining the area of the floor. Unheated spaces outside of the insulated fabric, such as attached garages or porches, should be excluded when determining the area of the floor but the length of the wall between the heated building and the unheated space should be included when determining the perimeter.
Where extensions to existing buildings are under consideration, the floor dimensions should be taken as those of the entire building, including the extension. NB The figures quoted are for guidance only. A detailed Uvalue calculation together with condensation risk analysis should be completed for each individual project. EN ISO , the soil has been assumed to be clay or silt, the wall insulation is assumed to overlap the floor insulation by mm minimum and the standard of workmanship has been assumed good and therefore the correction factor for air gaps has been ignored.
For a more precise calculation or if your construction is any different, please contact the Kingspan Insulation Technical Service Department see rear cover. The membrane should be brought up the surrounding foundation walls until it is sufficiently above the height of the wall so that it will connect with or form the Damp Proof Course.
The Kingspan Thermafloor TF70 insulation should be laid breakbonded with the joints lightly butted. A strip of the boarding should be placed vertically around the perimeter of the floor slab in order to prevent cold bridging of the slab. The subsequent application of the concrete slab and screed or other flooring material is similar to those laid over an uninsulated floor see Figure 1.
Laying Below the Floor Screed Kingspan Thermafloor TF70 is simply loose laid over the concrete floor slab or beam and block floor with the necessary water and vapour proof protection. Board joints should be tightly butted, staggered, and laid to a breakbonded pattern.
The floor slab should be uniformly flat without steps or gaps to provide continuous bearing support to the Kingspan Thermafloor TF Beam and block floors should be level and grouted. A thin section of board should be used around the perimeter of the floor area being insulated. This should be placed vertically against the abutting wall so that it connects with the insulation laid over the slab and protects the edge of the screed, so preventing cold bridging of the floor screed.
Use a sand and cement screed laid to a minimum thickness of 65 mm for domestic construction and 75 mm elsewhere see Figure 3. Laying in Suspended Timber Floors The application of Kingspan Thermafloor TF70 in suspended floor constructions should be carried out before commencement of floor boarding.
Kingspan Thermafloor TF70 should be cut to fit between joists. It should be supported on softwood timber battens, proprietary galvanised steel saddle clips or galvanised nails partially driven into the side of the joists. Any narrow gaps between a joist and perimeter wall should be insulated by specially cut pieces of board. They should be supported on blocks nailed to the underside of the joists.
Where water services, including central heating pipes, run below the floor boards the location of the Kingspan Thermafloor TF70 insulation can be lowered to create an insulated duct for the services.
Access from beneath the floor may later be obtained by removal of the nail supports, from the underside see Figure 7. Kingspan Thermafloor TF70 is not suitable for battens placing over timber joists. Kingspan Thermafloor TF70 should be cut to fit between battens. Any narrow gaps between battens and perimeter wall should be insulated by specially cut pieces of board.
Board joints should be tightly butted. Underfloor Heating Systems Please refer to the instructions of the specific underfloor heating system manufacturer. Ensure accurate trimming to achieve closebutting joints and continuity of insulation. Availability Kingspan Thermafloor TF70 is available through specialist insulation distributors and selected roofing merchants throughout the UK, Ireland and Europe. Packaging Depending on quantity, the boards are supplied in labelled packs shrink-wrapped in polythene.
Storage The polythene packaging of Kingspan Insulation products should not be considered adequate for long term outdoor protection. Ideally, boards should be stored inside a building. If, however, outside storage cannot be avoided, then the boards should be stacked clear of the ground and covered with a polythene sheet or weatherproof tarpaulin. Boards that have been allowed to get wet should not be used.
Health and Safety Kingspan Insulation products are chemically inert and safe to use. Please note that the reflective surface on this product is designed to enhance its thermal performance. As such, it will reflect light as well as heat, including ultraviolet light. Therefore, if this board is being installed during very bright or sunny weather, it is advisable to wear UV protective sunglasses or goggles, and if the skin is exposed for a significant period of time, to protect the bare skin with a UV block sun cream.
The reflective facing used on this product can be slippery underfoot when wet. Therefore, it is recommended that any excess material should be contained to avoid a slip hazard. If nailable sarking clips are used, ensure care is taken to avoid skin and eye contact with any sharp edges. Warning do not stand on or otherwise support your weight on this board unless it is fully supported by a load bearing surface.
The Facings Kingspan Thermafloor TF70 is faced on both sides with a low emissivity composite foil autohesively bonded to the insulation core during manufacture. Specification for laminated insulation boards for floors. Determination of compression behaviour. Methods 7 to 9. Kingspan Thermafloor TF70 should always be installed over a separate damp proof membrane minimum gauge.
Its durability depends on the supporting structure and the conditions of its use. However, it is recommended that any spills be cleaned off fully before the boards are installed. Ensure that safe methods of cleaning are used, as recommended by the suppliers of the spilt liquid. The insulation core is not resistant to some solventbased adhesive systems, particularly those containing methyl ethyl ketone.
Adhesives containing such solvents should not be used in association with this product. Damaged boards or boards that have been in contact with harsh solvents or acids should not be used.
70mm Thermafloor TF70 PIR Insulation Board Kingspan
Especially relevant is this range of products is essentially the same board with three different codes denoting its possible use. Kingspan TP10 Insulation Thermapitch is Kingspan insulations roof insulation and is made for use as a pitched roof insulation. This would usually be their range of PIR insulation boards from 50 mm to mm which can be friction fit in between rafters. In addition a thinner layer of Kingspan TP10 under the rafters to cover any possible cold bridging through the timbers. These thermal bridging boards would usually be from 25mm to 40mm thick. A thick board generally starting from 75 mm upwards is placed over a damp proof membrane and then covered with another layer of membrane before screed is applied.
Kingspan Thermafloor TF70 Floor Board 1.2m x 2.4m - All Sizes